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$103+ Cheap flights from Ontario to Boston (ONT - BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — BOS
Mar 15 — Mar 221
Sun 3/15
Sun 3/22
1 adult, Economy
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Cheap flight deals from Ontario to Boston

Cheapest flights from Ontario to Boston
Explore the most affordable flight options available from Ontario to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 13, 2026.

This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/96:37 pm
ONT
-
BOS
1 stop10h 36m
United Airlines
Wed 3/114:30 pm
BOS
-
ONT
1 stop8h 48m
United Airlines
Deal found 2/11$254
This United Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:59 pm
ONT
-
BOS
1 stop9h 50m
United Airlines
Wed 3/185:45 am
BOS
-
ONT
1 stop9h 33m
United Airlines
Deal found 2/9$259
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1011:59 pm
ONT
-
BOS
2 stops9h 57m
United Airlines
Tue 3/174:30 pm
BOS
-
ONT
1 stop8h 48m
United Airlines
Deal found 2/8$264
This Trip.com deal was found by Cheapflights users on 2/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/54:02 pm
ONT
-
BOS
1 stop11h 52m
Hawaiian Airlines
Wed 3/117:00 am
BOS
-
ONT
1 stop11h 08m
Hawaiian Airlines
Deal found 2/10$265
This American Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:02 pm
ONT
-
BOS
1 stop9h 32m
American Airlines
Tue 3/176:45 am
BOS
-
ONT
1 stop10h 03m
American Airlines
Deal found 2/9$269
This Alaska Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/44:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Tue 3/107:00 am
BOS
-
ONT
1 stop11h 08m
Alaska Airlines
Deal found 2/8$276
This Alaska Airlines deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/114:02 pm
ONT
-
BOS
1 stop11h 52m
Alaska Airlines
Tue 3/177:00 am
BOS
-
ONT
1 stop11h 08m
Alaska Airlines
Deal found 2/9$278
This United Airlines deal was found by Cheapflights users on 2/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/21:50 pm
ONT
-
BOS
1 stop7h 59m
United Airlines
Tue 3/108:45 am
BOS
-
ONT
2 stops11h 56m
United Airlines
Deal found 2/11$283

Find flight deals from Ontario to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated February 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$254
(United Airlines)

One-way from

$103
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$331
Provider with most accurate pricing for Ontario-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Boston Logan Intl flights.
Search Deals
From Ontario to Boston Logan Intl
Search Deals
One-way flight from Ontario to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
Use the filters below to find and compare flights from Ontario to Boston that are best for you.

Fly from

Ontario

Fly to

Boston

Route

Depart

Return

Price

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 3/2

1:50 pm-12:49 am

1 stop7h 59m

Boston Logan Intl

Tue 3/10

8:45 am-5:41 pm

2 stops11h 56m

$283

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 3/5

12:02 pm-11:59 pm

1 stop8h 57m

Boston Logan Intl

Tue 3/10

7:00 am-3:08 pm

1 stop11h 08m

$293

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Sat 2/28

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Thu 3/5

4:36 pm-11:52 pm

1 stop10h 16m

$295

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 3/10

10:25 pm-10:04 am

1 stop8h 39m

Boston Logan Intl

Tue 3/17

6:15 am-12:23 pm

1 stop9h 08m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 2/26

1:40 pm-12:49 am

1 stop8h 09m

Boston Logan Intl

Fri 2/27

6:00 am-12:38 pm

1 stop9h 38m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 2/26

6:00 am-4:25 pm

1 stop7h 25m

Boston Logan Intl

Sat 2/28

6:10 am-12:07 pm

1 stop8h 57m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Tue 2/24

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Wed 2/25

4:36 pm-11:52 pm

1 stop10h 16m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Mon 3/2

10:20 pm-10:02 am

1 stop8h 42m

Boston Logan Intl

Mon 3/9

6:44 pm-11:51 pm

1 stop8h 07m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Fri 5/1

5:05 pm-6:00 am

1 stop9h 55m

Boston Logan Intl

Tue 5/5

7:37 am-5:15 pm

1 stop12h 38m

$297

OntarioBoston

ONT - BOS

ONTBOS

Ontario

Thu 2/26

4:02 pm-6:54 am

1 stop11h 52m

Boston Logan Intl

Mon 3/2

7:00 am-3:08 pm

1 stop11h 08m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 21 results
1
2
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Compare providers for flights from Ontario to Boston

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Boston in February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Boston

How far ahead should I book a flight from Ontario to Boston?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Boston. Price data was last updated on February 6, 2026.

Booking 40 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario to Boston?

Currently, February is the cheapest month in which you can book a flight from Ontario to Boston (average of $138). Flying from Ontario to Boston in July is currently the most expensive (average of $188). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated February 13, 2026.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Ontario to Boston by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,283 reviews
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,191 reviews
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,286 reviews
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,277 reviews
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
JetBlue
7.2
Good
2,897 reviews
Southwest
8.0
Very good
4,283 reviews

Overall

8.0

Comfort

8.0

Crew

8.6

Food

7.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Boston?

    A quick flight from Ontario to Boston can take about 7h 59m. United Airlines provides one of the quickest options available for as low as $283. The distance between Ontario and Boston is about 2559 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Ontario to Boston round-trip?

    According to our current data, JetBlue ($155), Delta ($178), and United Airlines ($266) offers the cheapest pricing from Ontario to Boston. JetBlue is priced at 62% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Boston one-way?

    $93 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from $112 and $129, respectively.

  • Can I find deals for flights from Ontario to Boston that include hotel bookings?

    Yes. In addition to deals on Ontario to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Boston.

  • Can I find deals for business class flights from Ontario to Boston?

    Yes. Cheapflights offers flight deals from Ontario to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Boston?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Boston (average of $138). Flying from Ontario to Boston in July is currently the most expensive (average of $188). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Medford
Cambridge
Hampton Beach
Watertown
Seekonk
Brockton
Concord
Seabrook
Cranston
Lincoln
Warwick
Smithfield
Peabody
Quincy
York Beach
Londonderry
Swansea
Old Orchard Beach
Waltham
Lowell

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to Boston

Discover the top 6 airlines that operate flights from Ontario to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$155Average$319FlexibilityNo cancel feeOn-time62%
DeltaCheapest$178Average$328FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$266Average$416FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$278Average$366FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$297Average$409FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$311Average$443FlexibilityNo cancel feeOn-time63%

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